Compressed Air Flow Conversion
Use this compressed air flow calculator to convert between actual CFM and standard SCFM using pressure and temperature. This is useful for compressor sizing, pneumatic system design, air audits, and flow troubleshooting.
SCFM is standardized flow, while CFM is actual flow at operating conditions. This calculator uses a simple ideal gas relationship and is intended for practical engineering estimates.
CFM = SCFM × (Pstandard absolute / Pactual absolute) × (Tactual absolute / Tstandard absolute)
Need help applying this to a real pneumatic system?
If you are comparing compressor supply, machine demand, or pressure-corrected flow in a plant air system, connect with an automation integrator for help with the real-world design.
Find an IntegratorQuick Air Flow Examples
| Actual Flow | Pressure | Temperature | Approx. SCFM |
|---|---|---|---|
| 10 CFM | 90 psig | 68°F | 71.2 SCFM |
| 25 CFM | 90 psig | 68°F | 177.9 SCFM |
| 50 CFM | 100 psig | 68°F | 390.1 SCFM |
| 100 CFM | 125 psig | 68°F | 950.3 SCFM |
What This CFM SCFM PSI Calculator Solves
Engineers and technicians often search for terms like CFM to SCFM calculator, SCFM to CFM conversion, compressed air flow pressure correction, and how pressure affects CFM. This page helps estimate air flow under actual operating conditions for compressors, cylinders, regulators, nozzles, and plant air systems.
This is especially useful when one source quotes compressor capacity in SCFM while another source describes device demand in actual CFM at pressure. Without correcting for pressure and temperature, those numbers can look comparable when they are not.